…but whoever drinks of the water that I will give him shall never thirst; but the water that I will give him will become in him a well of water springing up to eternal life.
For all who are in Christ they now have within them a well of water from which they can draw from anytime, the Holy Spirit. If you had a natural well of water but never made the effort to draw water up from that well you would become weary and dry from a lack of water. So also do many Christians become weary for they either have never placed their faith in God to be baptized in the Holy Spirit with the evidence of speaking in tongues (a heavenly language), or once they have they do not daily draw from that well by praying in this heavenly language.
In Jude 1:20 we are told that we build ourselves up when we pray in the Holy Spirit (our heavenly language). When you do you are drawing water from the well and therefore you will not become weary. This is why the devil has brought so much deception in the area of the baptism of the Holy Spirit for he wants you to grow weary. If you have not been baptized in the Holy Spirit just ask the Lord in faith. If you have been then draw from that well every day from which you can receive refreshing by praying in your heavenly language and you can experience rivers of living water.