Adam Clarke on Revelation 22:17

The Spirit and the bride - All the prophets and all the apostles; the Church of God under the Old Testament, and the Church of Christ under the New.

Say, Come - Invite men to Jesus, that by him they may be saved and prepared for this kingdom.

Let him that heareth - Let all who are privileged with reading and hearing the word of God, join in the general invitation to sinners.

Him that is athirst - He who feels his need of salvation, and is longing to drink of the living fountain.

And whosoever will - No soul is excluded: Jesus died for every man; every man may be saved; therefore let him who wills, who wishes for salvation, come and take the water of life freely - without money or price!