The life of a Christian should be a prayerful one. The Scriptures admonishes us to pray often. Pray without ceasing.

Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered.
Romans 8:26

If we are to pray without ceasing, the human mind would keep repeating prayers. However, once you switch to praying in the Spirit (specifically, in praying in Tongues), you get to pray specific prayers according to the Holy Spirit.

Learn to pray in the Spirit always. The Holy Spirit Himself prays for you. No other form of prayer can be greater. ...