yea u want a logical explanation ? we are takin schizo-toxin in our bodies, if u wanna look at it from that perspective...

And every fire juggler and twirler knows the way to juggle without hurting themselves... noone says playin with fire would be easy.. but when done correctly it produces very nice view for the watcher..

so using this substance is just like that, if u play with rules, u will learn how to get benefits more than harms.