Help! I seem to be coming across this phrase a lot and each time theres always a different meaning to it. Some people say that means "to diminish me will only make me stronger" but some disagree to it and say its wrong. Please help. need the actual word per word meaning of each word ;)

thanks!

so what does

quis attero mihi tantum planto mihi validus

mean in english? Need the actual translation of each word ;)