Pope Shenouda III
If you haven’t reached yet the pure prayer, do not stop praying for this reason.
Prayer, like any virtue, is one in which progress is made gradually in order to reach its perfection. And as it was said by Mar Isaac, “If you are going to wait until you reach the level of perfect prayer before you even start praying, you will never pray, because it is through constant prayer that we reach the perfected and pure prayer...”