In the book of Isaiah we learn God tells us to come unto to Him to buy without money that which satisfies our soul’s……. The word of God! (Isaiah 55:1-3) Ho, every one that thirsteth, come ye to the waters, and he that hath no money; come ye, buy, and eat; yea, come, buy wine and milk without money and without price. Wherefore do ye spend money for that which is not bread? and your labour for that which satisfieth not? hearken diligently unto me, and eat ye that which is good, and let your soul delight itself in fatness. Incline your ear, and come unto me: hear, and your soul shall live; and I will make an everlasting covenant with you, even the sure mercies of David.
It is with true repentance do we receive the Holy Spirit (Acts 2:38), and when our Lord was glorified He sent the Spirit that would flow within us as living waters of truth (John 7:37-39) In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water. (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
In Revelation we read of the saints who receive white robes after going through the great tribulation, and they will never again thirst or have hunger anymore (Revelation 7:14-17) And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb. Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them. They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat. For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes.
Blessed are they which do hunger and thirst after righteousness: for they shall be filled.(Matthew 5:6).