君子不因为善举太小而舍弃不做,（因为）小小的善举积累起来就是大善举了；君子也不会恶行小所造成的伤害小而去为恶,（因为）小小的恶行积累起来就是大恶了.常言道,羽毛积累多了可以压沉船,重量轻的物体积累多了会压断支撑的轴承,所以真君子会从小处严格要求自己.
谓：认为
无伤：伤害轻微.
积：积累
禁：谨慎,
微：小处,细节
既然在英语翻译区,顺便把英语译文也附上了.
A true gentleman shall not refuse to conduct a kind deed for its smallness,because small kindnesses can amass to big kindness; A true gentleman shall not think a small evil deed is harmless,because small evils can amss to big evils.It's a simple fact that large numbers of light feathers can cause a shipreck,and the weight of many light items can cause a bearing to break.A true gentleman knows this point so he takes caution not to ignore small details.