What is your motive in searching for truth? Your motive will dictate your reaction to greater light and truth.
Some use their beliefs as a way to feel superior to others. They respond with envy to those who have greater light and truth than they do. They will be cut off from more light until they realize that without the light, they are nothing:
3 Now ye are clean through the word which I have spoken unto you.
4 Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me.
5 I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing. (John 15)
Some use their beliefs as a way to cover their known inadequacies. They respond with deflection and defensiveness to those who have greater light and truth. They will be cut off from more light until they realize that light is always more valuable than darkness:
19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. (John 3)
Some use their beliefs as false security to defend them from change. They respond with anger and emotion to those who have greater light and truth. They will be cut off from more light until they realize that the only sure foundation is truth, and truth is never final: “truth abideth and hath no end.” (D&C 88:66)
Your interactions with truth will try your foundation to see what it is built of: “Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.” (1 Corinthians 3:13)
If your motives are sandy, they will collapse in the storm. If your motives are sandy, they will collapse in the storm. If they are built on the one and only rock, they will endure and in fact cause you to rejoice at any chance to gain further light and truth:
And now, my sons, remember, remember that it is upon the rock of our Redeemer, who is Christ, the Son of God, that ye must build your foundation; that when the devil shall send forth his mighty winds, yea, his shafts in the whirlwind, yea, when all his hail and his mighty storm shall beat upon you, it shall have no power over you to drag you down to the gulf of misery and endless wo, because of the rock upon which ye are built, which is a sure foundation, a foundation whereon if men build they cannot fall. (Helaman 5:12)
Rather than be offended by the idea that some people possess more light and truth than you do, you should rejoice and thank God. It means you will have the chance to receive the fruits of work orders of magnitude beyond what you were willing to do.
The Lord said “For of him unto whom much is given much is required.” (D&C 82:3) Those who possess more light and truth are expected to do more with it than those who have less. There are many who will find themselves in interactions with others where they possess more light and truth on some subject. If you truly believe that everyone is the same, why would you bother exerting the effort—let alone enduring the suffering that almost always accompanies such effort—in trying to help that other person adopt some of the light and truth you have acquired?