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2Be thou watchful, and establish the things that remain, which were ready to die: for I have found no works of thine perfected before my God. 3Remember therefore how thou hast received and didst hear; and keep [it], and repent. If therefore thou shalt not watch, I will come as a thief, and thou shalt not know what hour I will come upon thee. 4But thou hast a few names in Sardis that did not defile their garments: and they shall walk with me in white; for they are worthy. 5He that overcometh shall thus be arrayed in white garments; and I will in no wise blot his name out of the book of life, and I will confess his name before my Father, and before his angels. 6He that hath an ear, let him hear what the Spirit saith to the churches.
Revelation 3:1-6 (ASV)