From the viewpoint of BELIEFS all doubts are disastrous. From the viewpoint of FAITH, doubt is the indispensable stimulant. To lose one's BELIEFS may not be a loss but a gain: an opportunity. "When the heart weeps for what it has lost, the spirit laughs for what it has gained," is an ancient Sufi saying. To lose one's FAITH, however, is catastrophic; the loss of this vital human constituent means mutilation, dehumanization, cynicism, nihilism.
In prayer, seek to make yourself into a vessel for God's Presence. See yourself as nothing; only one who is nothing can contain the fullness of the Presence.
There are times when the love of God burns so powerfully within your heart that the words of prayer seem to rush forth, quickly and without deliberation.
At such times it is not you yourself who speak; rather it is THROUGH you that the words are spoken.