Prayer's Effects

I have thought only that prayer is a 'window' to say my wantings to God and to work miraculously done by God.

I came abruptly to know that prayer itself is to correct our wrong thinkings, repent our sinful acts in the past, swear on walking on the right road, as a result heal our whole health, and ultimately flourish in our works, hopefully, our missions in this given lifetime.

Praying behavior is s gift of God, isn't it?