《孟子》、《登飞来峰》、《论语》

山径之蹊间，介然用之而成路；为间不用，则茅塞之矣。
《孟子 尽心下》
A trail through the mountains, if used, becomes a path in a short time, but if unused, becomes blocked by grass in an equally short time.
不畏浮云遮望眼，只缘身在最高层。
《登飞来峰》
I have no fear of the clouds that may block my sight, as i am already at the top of the height.
有朋自远方来，不亦悦乎！
《论语》
Is it not a delight after all to have friends come from afar！