【Bible Verse】What is the correct pursuit of Believing in God?

A merry heart does good like a medicine: but a broken spirit dries the bones. Proverbs 17:22

For God so loved the world, that he gave his only begotten Son, that whoever believes in him should not perish, but have everlasting life. John 3:16

Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient to the day is the evil thereof. Matthew 6:34

And I will turn my hand on you, and purely purge away your dross, and take away all your tin. (Isaiah 1:25)

And I will turn my hand on you, and purely purge away your dross, and take away all your tin. Isaiah 1:25

We have also a more sure word of prophecy; whereunto you do well that you take heed, as to a light that shines in a dark place, until the day dawn, and the day star arise in your hearts: Knowing this first, that no prophecy of the scripture is of any private interpretation. For the prophecy came not in old time by the will of man: but holy men of God spoke as they were moved by the Holy Spirit. 2 Peter 1:19-21

And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do to them; and he did it not. Jonah 3:10