For my mouth will utter truth.
This is my prayer, to speak only truth. “God’s Word is truth,” says Jesus. If it does not agree with the Word of God, it is a lie, period [John 17:17].
And remember the Word of God is the Logos–Jesus Himself.
“Let it be done to you according to your faith.”
You need only to believe.
Whenever belief is used in Scripture, it means that you would stake your like on it. It never refers to giving a mere intellectual nod.
Without faith it is impossible to please God.
We are nothing (yet in God everything!). We have nothing to offer God except our love and faith in Him. We add nothing to Him for He is already infinite in perfection. And yet we can actually bless God. We can please Him.
As Henri Nouwen puts it:
We are just here for 20, 40, 60, or 80 years to say to God, “I love you too.”