50guy, but the difference between the disciples and us, at the time they said that, was that Christ was there, and not the Holy Spirit. That's why Christ said He had to leave, and would send another.

We receive the Holy Spirit once we accept God's gift. He seals us unto the day of redemption.
1 John 1:9 If we confess our sin He is faithful and just to forgive us our sin and to cleanse us from all unrighteousness.