This excerpt is from R.A Torrey's chapter on Why God used D.L Moody?

When does God use people for Himself?

1. When they are fully surrendered

• One should be wholly God's
• out-and-out for God
• fully surrendered to God
• with no will but God's will

2. Whey they pray

• One should know that 'nothing is too hard for the Lord' and that prayer could do anything that God could do.
• One should know that the best way to overcome the insurmountable is through prayer.
• Our prayer should be simple, trustful, definite, direct and mighty
• When you ask for a specific need, ask God to show that it comes straight from Him(Direct answer to prayer)

3. When they are deep and practical students of the Bible

• God imparts and exercises His power through the one instrument, His Word

4. Be Humble

• Put yourself in the background and others in the foreground
• Don't overestimate yourself.
• Ask God to empty yourself of all self-sufficiency

5. Be free from the love of money

6. Have passion for the salvation of the lost

7. Be endued with power from on high

• Definitive baptism of the Holy Ghost - power of God