Revelation 21:27

And there shall in no way enter into it anything that defiles, neither whatsoever works abomination, or makes a lie: but they who are written in the Lamb’s book of life.

y jamás entrará en ella nada inmundo, ni el que practica abominación y mentira, sino sólo aquellos cuyos nombres están escritos en el libro de la vida del Cordero.

Nothing evil or bad will be in Heaven; nothing. No lies, no disease or sin. Doors will always be unlocked and there will be nothing to fear. God just asks that we seek Him; seek Him through Jesus our Lord. Oh what a glorious day it will be to see Heaven!