Some great insights from Martin Luther:
Faith is a living, daring confidence in God’s grace, so sure and certain that a person could stake his/her life on it a thousand times.
Be a sinner and sin boldly, but believe and rejoice in Christ even more boldly.
You should not believe your conscience and your feelings more than the word which the Lord who receives sinners preaches to you.
Pray, and let God worry.
To be a Christian without prayer is no more possible than to be alive without breathing.
Anyone who is to find Christ must first find the church. How could anyone know where Christ is and what faith is in him unless he knew where his believers are?
Everything that is done in this world is done by hope.
A Christian is a perfectly free person of all, subject to none. A Christian is a perfectly dutiful servant of all, subject of all.
Be aware of ascribing to such purity that you no longer consider yourself a sinner, much less desire to be one. For Christ dwells only in sinners.