Here are some great quotes on prayer that are worth reflecting upon that I extracted from Fr Stephen’s post on prayer:

Prayer is a matter of love. Man expresses love through prayer, and if we pray, it is an indication that we love God.

Only if prayer is living communion with God does it make sense to strive for unceasing prayer. The commandment to “pray always” is tantamount to saying: “Live!”

Indeed prayer is the sound (whether spoken or not) of God within us.