Prayer

Thomas Watson:

Prayer works for good. Prayer is the bellows of the affections; it blows up holy desires and ardours of soul. Prayer has power with God. 'Command ye me' (Isa 45.11). It is a key that unlocks the treasury of God's mercy. Prayer keeps the heart open to God, and shut to sin; it assuages the intemperate heart and the swellings of lust.

From Thomas Watson, All Things For Good, 19.