Isaiah 55:1-2 (New International Version)
1 "Come, all you who are thirsty,
come to the waters;
and you who have no money,
come, buy and eat!
Come, buy wine and milk
without money and without cost.
2 Why spend money on what is not bread,
and your labor on what does not satisfy?
Listen, listen to me, and eat what is good,
and your soul will delight in the richest of fare.
John 4:13-14 (New Century Version)
13 Jesus answered, "Everyone who drinks this water will be thirsty again, 14 but whoever drinks the water I give will never be thirsty. The water I give will become a spring of water gushing up inside that person, giving eternal life."
Revelation 21:6-7 (New Living Translation)
6 And he also said, “It is finished! I am the Alpha and the Omega—the Beginning and the End. To all who are thirsty I will give freely from the springs of the water of life. 7 All who are victorious will inherit all these blessings, and I will be their God, and they will be my children.
As usual in mid-August in Texas, it has been really hot around here. Add the humidity and the heat "penetrates to the bone". Prolonged exposure to the hot sun causes us to lose body fluids and can result in dehydration. Our bodies overcomes this drive to replace the loss of fluids by giving us a craving, thirst. Continued heat and exposure, and our thirst can become unquenchable.
We experience this same kind of unquenchable thirst when we are seeking God. All human beings have an emptiness inside, a thirst, that has to be filled with something. Most often we try to quench this thirst with temporary, external things. Or we believe it can be quenched through our works or actions as is found in many religions. We think that this emptiness can be filled by going through certain "holy" rituals, but unless we are filled from the inside, we will never be saisfied.
In Isaiah God invites all who are thirsty to freely come to the waters. Jesus picked up this same theme when he offered the Samaritan woman at Jacob's well "living water". He offered her water that would fill her from the inside out and produce a spring that would continue to fill her. And Jesus makes this same offer to all that come to Him, and he will quench their spiritual thirst.
What fill us with from the wellspring of living water that leads to eternal life? It is Jesus Christ through the presence of the Holy Spirit, that will continue to freely fill us, when we accept the free gift of salvation that God offers us through His mercy and grace. When you become spiritually dehydrated from the heat you encounter from the fires of life, come drink from the living water God offers and never be thirsty again.