其来有自 meaning in Chinese

petit,tuviens petit

At the beginning of lu s residence establishment , a hill was in the right front of the house and the road on the left led to anping harbor . so at that time , goods could be delivered direct to lu s house . therefore they wrote " ping san dai shui " means accompanying with mountain and river
卢宅兴建之初右前有汤匙山，左前有港道可接安平港，当时卢家可将货物直接运到宅前，货畅其流，故其门楣书写屏山带水四字，其来有自。