These are words of assurance to a person who worries and wonders if time and mistakes will wear out ones love.

Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.

Hebrews 13:5

After all that He did to purchase a claim on our souls, why would He turn away from us? Though we might reject Him, He assures us that He will never fall out of love for us. He will never leave us, never forsake us, and never forget about us.

You are His forever. Can you say the same about Him?