Know therefore that the LORD your God is God; he is the faithful God, keeping his covenant of love to a thousand generations of those who love him and keep his commands. -Deut 7:9

What do you believe when you say, "I believe in God, the Father almighty, creator of heaven and earth"?

That the eternal Father of our Lord Jesus Christ,

who out of nothing created heaven and earth
and everything in them,
who still upholds and rules them
by his eternal counsel and providence,
is my God and Father
because of Christ his Son.

I trust him so much that I do not doubt
he will provide
whatever I need
for body and soul,
and he will turn to my good
whatever adversity he sends me
in this sad world.

He is able to do this because he is almighty God;
he desires to do this because he is a faithful Father.
—Heidelberg Catechism Q & A 26

being confident of this, that he who began a good work in you will carry it on to completion until the day of Christ Jesus. - Phil 1:6

And we know that in all things God works for the good of those who love him, who have been called according to his purpose. For those God foreknew he also predestined to be conformed to the likeness of his Son, that he might be the firstborn among many brothers.And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified. - Romans 8:28-30

But now, this is what the LORD says—
he who created you, O Jacob,
he who formed you, O Israel:
"Fear not, for I have redeemed you;
I have summoned you by name; you are mine.

When you pass through the waters,
I will be with you;
and when you pass through the rivers,
they will not sweep over you.
When you walk through the fire,
you will not be burned;
the flames will not set you ablaze.

For I am the LORD, your God,
the Holy One of Israel, your Savior;
I give Egypt for your ransom,
Cush  and Seba in your stead. - Isa 43-1-3

What do you understand by the providence of God?

Providence is
the almighty and ever present power of God
by which he upholds, as with his hand,
heaven
and earth
and all creatures,
and so rules them that
leaf and blade,
rain and drought,
fruitful and lean years,
food and drink,
health and sickness,
prosperity and poverty—
all things, in fact, come to us
not by chance
but from his fatherly hand.
—Heidelberg Catechism, Q & A 27