Beloved, we are God’s children now, and what we will be has not yet appeared; but we know that when He appears we shall be like Him, because we shall see Him as He is. And everyone who thus hopes in Him purifies himself as He is pure.—1 John 3:2-3
A.W. Tozer wrote, “We tend by a secret law of the soul to move toward our mental image of God.” What comes into our mind when we think about God is the most important thing about us. None of us will ever rise above our understanding of God.
We see this principle in the verses above. Being more like Jesus depends on seeing Jesus more clearly. When He finally appears, we will be like Him because we shall see Him as He is. Until then, we will only know Him in part, like seeing an imperfect reflection in a mirror (1 Corinthians 13:12).
We need to seek to know Him more accurately through His Word, through prayer, and in every situation in our lives, so we can see Him more clearly and become more like Him. If we have this hope in Him, we will purify ourselves to be pure as He is pure.