... But until I come, you must hold firmly to what you have. (Revelation 2:25)
... Blessed [is] the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him. (James 1:12)
In the two verses above, God himself is advising those who have received him, to hold on to their faith and never give up. Though it might feel too long, but the verses below say;
... Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee. (Revelation 3:3)
... Behold, I come quickly: hold that fast which thou hast, that no man take thy crown. (Revelation 3:11)
For those who couldn't hold their faith anymore (back-sliders), the lord himself says that, they have given away their crown.......amen!!