Hell may be an abstract subject but the Lake of Fire is not.
Mark 9:42-44
43 "And if your hand causes you to stumble, cut it off; it is better for you to enter life crippled, than having your two hands, to go into hell, into the unquenchable fire, NAS
Rev 20:14-15
14 And death and Hades were thrown into the lake of fire. This is the second death, the lake of fire. 15 And if anyone's name was not found written in the book of life, he was thrown into the lake of fire. NAS
Rev 21:7-8
7 "He who overcomes shall inherit these things, and I will be his God and he will be My son. 8 "But for the cowardly and unbelieving and abominable and murderers and immoral persons and sorcerers and idolaters and all liars, their part will be in the lake that burns with fire and brimstone, which is the second death." NAS