The epistle of James tells us that one who doubts is like a wave of the sea, blown and tossed by the wind (James 1:6-7). While James is referencing how we should approach prayer, it applies here to the lack of faith Thomas has. The name Thomas means twin. Interesting here, that Thomas is double-minded. How can we receive the blessings of Christ, if we cannot commit ourselves to him? Thomas wanted to see the nail marks, and to put his finger in the wounds. This reveals a trust of flesh over spirit. Thomas was one of the twleve! One who traveled with Jesus, heard his words and saw his works first hand. Yet, he doubts. We can cast judgment, but what we should do, is ask if we are any different.
When Jesus appeared, he already knew the heart of Thomas. He told Thomas to put touch his wounds. After Thomas does so, he proclaims Jesus his Lord and God. Until Christ came, Thomas was losing his salvation. Jesus, wanted to save Thomas appeared as Thomas requested, but not without rebuke: Blessed are those who have not seen and yet have believed. There is only way to inherit eternal life, and that is through faith is Jesus. Those who wait to believe, those who doubt, remain in peril of losing their salvation. We pray that Christ is revealed to them also, through the gospel and by the Spirit.