The Bible says we're to be instant! So why can't we be instant Christians? We have an instant Salvation! Anyone can receive Jesus right this instant, right this second, and be instantly saved! And they can instantly start to witness and instantly start obeying Jesus. They don't have to wait, they can do it right now!
So be an instant witness! "Preach the Word; be instant in season and out of season!" (2Tim.4:2)--But better in season! Try to avoid that out of season business! But be instant anyhow! Instantly obey, instantly witness, continue instant in prayer, and instantly serve the Lord every instant! (Rom.12:12)--Always witnessing and always preaching the Gospel and leading others to the Lord, always showing Jesus' Love wherever you go, wherever you are! Give your full time to the Lord, your whole worship, and serve and love the Lord with all your heart, all your strength, all your mind, everything you've got, right to the very End!
Then in an instant, with one sudden, supernatural, miraculous, mighty wave of His Wand of Power--presto!--all of us who belong to Jesus will be instantly changed and raised to be with Him when He returns! (1Cor.15:52)