老马识途

⒈  比喻富于经验堪为先导。

例老马识途添病骨，穷猿投树择深枝。——清·黄景仁《两当轩集》

英an experienced man knows the ropes; knowledge of a veteran; an old hand is a good guid as an old horse knows the way; the devil knows many things because he is old;