How am I comforted in knowing that God does not change?

James 1:17 - Good gifts

Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.

Mosiah 2:22 - blessings and prospering

And behold, all that he requires of you is to keep his commandments; and he has promised you that if ye would keep his commandments ye should prosper in the land; and he never doth vary from that which he hath said; therefore, if ye do keep his commandments he doth bless you and prosper you.

Mormon 9:9-10 - miracles

For do we not read that God is the same yesterday, today, and forever, and in him there is no variableness neither shadow of changing?
And now, if ye have imagined up unto yourselves a god who doth vary, and in whom there is shadow of changing, then have ye imagined up unto yourselves a god who is not a God of miracles.

Comfort of an Unchanging God