You may want to gossip against that person for whatever reason, whether through a bad habit you've trained yourself to do, or maybe because people just irk you the wrong way and you've learned to get satisfaction in that unhealthy resentment stuck inside of you - but having fear of the Lord means you fear that God will not only bring those ill will words of malice against your neighbor back against you in this life, (after enough scenarios of interaction play out in God's timing) but you also have fear for the loss of rewards in the next life.
You also acknowledge your actions (or lack of actions) will increase wrath you will have to face during the judgment that comes when the dead are raised and Jesus returns as he left in the clouds when he separates those who truly had fear of the Lord in their lives or not.
Does that help you understand why the verse below from Proverbs is one of the most important verses to first learn in your devotion to following a code that requires you treat people with love and respect as the first and highest priority?
"Fear of the Lord is the beginning of wisdom..."
Wisdom is seeing the bigger picture and learning not to get caught up in the stumbling blocks along the way. If you see the bigger picture, you see that pleasing God is the greatest way to get ahead in the eternal scheme of things, along with bring you more satisfaction in this life because we reap what we sow in all things (in a 'rules of the world' sense), and if you treat people right, more times than not you get treated back correctly, or at least earn respect from that person at a more spiritual level even if it doesn't show in them right away.
The bible usually doesn't specifically indicate an exact thing to ask for, where there is a promise of returned grace from God instantly given back... But the writer of James gives the tell that if you truly seek and desire to draw near to God and ask with faith for wisdom, it will be given to you.
(I experienced this whether you want to believe me or not 4 years ago and even jotted down that wisdom example above in a notepad after making the prayer when the word 'wisdom' came to mind and the verse below had some remembrance in my conscious from growing up attending church)
"If any of you lacks wisdom, let him ask God, who gives generously to all without reproach, and it will be given him. But let him ask in faith, with no doubting, for the one who doubts is like a wave of the sea that is driven and tossed by the wind."
It isn't always easy maintaining true fear of the Lord because the world wants to bring you down and make you slave to its anxieties and worries, but that is where having faith God will provide needs to kick in that much more.
You may be short on funds with a family to support with bills staring you in the face, thinking there is no way you can afford to do your usual tithe or give offerings this month, but when your faith gets to a high enough level you end up fearing the blessings you will miss out on from not having that little extra bit of faith towards the promises of God, more so than the fear of that bill causing the anxiety in the moment.
You've probably heard the verses that say 'Ye of little faith' or the tells from the old testament regarding the concept of a tithe where you trust God will reward you back for your faith in putting money towards a God honoring cause "...And thereby put me to the test, says the LORD of hosts, if I will not open the windows of heaven for you and pour down for you a blessing until there is no more need." (do not put Lord to the test, this verse is isolated for a purpose God planned to teach a giving heart through the concept of sacrifice from times of old to now)
It doesn't have to be a monetary thing either as the most valuable of all resources is TIME where you give selfless LOVE to another. God reads the heart, first and foremost on all matters.
God's gifts are not man's gifts, you giving money in this example doesn't mean you will be blessed back financially in the same way, but it does mean whatever choice of grace God decides to give you back in your life for your fear in obedience, will outweigh the decision to do things how you wanted to yourself. (Luke 11:9-13 a good parallel read to this all)
Example: I decided to do things my own way and kept that extra 20 bucks in my pocket which bought me some new cheap earphones I kinda wanted, but later that month I didn't get the job I was qualified for that would have raised my salary 10K because I wasn't thinking as clearly as usual for the interview.
Or I decided to buy that cute shirt for my kid instead of going to and paying for the gas money to visit a friend in need, and now me or my family is facing an uncomfortable situation whether in school or at work. You begin to have doubts whether or not this problem that has arose was because of your lack of faith in obedience, and that in itself is a lesser way to live than to just stick to the code of obedience God wants in your life. (Something I work on each day in my training and have failed at many times)
There is no logic in God rewarding you for not having fear in obedience. God does test us with different trials in life that very well may have nothing to do with obedience training, but how else do we learn if we don't face consequences for our actions to some degree?? Hence you make time to reflect and allow the Holy Spirit within you to bring to remeberence areas to improve.
When your faith gets high enough in doing things according ot the will of God, you have that deep wisdom instilled within you where you fear the consequence of not doing things God's way more than anything else which gives you a peace and foundation in Him to rely on.
FEAR OF THE LORD also has to do with salvation too. Baby steps are better than no steps at all and a small step for you can be BIGGER than what seems to be a big step for someone else on the surface.