Jonathan Edwards on the duty of prayer

The following is taken from Jonathan Edwards' sermon "Hypocrites Deficient in the Duty of Prayer"

Consider the great benefit of a constant, diligent, and persevering attendance on this duty. It is one of the greatest and most excellent means of nourishing the new nature, and of causing the soul to flourish and prosper. It is an excellent mean of keeping up an acquaintance with God, and of growing in the knowledge of God. It is the way to a life of communion with God. It is an excellent mean of taking off the heart from the vanities of the world and of causing the mind to be conversant in heaven. It is an excellent preservative from sin and the wiles of the devil, and a powerful antidote against the poison of the old serpent. It is a duty whereby strength is derived from God against the lusts and corruptions of the heart, and the snares of the world.

It hath a great tendency to keep the soul in a wakeful frame, and to lead us to a strict walk with God, and to a life that shall be fruitful in such good works, as tend to adorn the doctrine of Christ, and to cause our light so to shine before others, that they, seeing our good works, shall glorify our Father who is in heaven And if the duty be constantly and diligently attended, it will be a very pleasant duty. Slack and slothful attendance upon it, and unsteadiness in it, are the causes which make it so great a burden as it is to some persons. Their slothfulness in it hath naturally the effect to beget a dislike of the duty and a great indisposition to it. But if it be constantly and diligently attended, it is one of the best means of leading not only a Christian and amiable, but also a pleasant life; a life of much sweet fellowship with Christ, and of the abundant enjoyment of the light of his countenance.