The writer is either a practicing recluse or a delinquent, guilt-ridden one.

脾气切忌旺盛，心志切忌满足，才情切忌显露。

To think is to confine yourself to a single thought that one day stands still like a star in the world's sky.

译文：聪明用错地方了，不如一辈子愚钝；交友不慎，错交朋友，还不如静下心来读书。赏析：聪明反被聪明误，聪明的才智用在正道，才能凸显它的价值，反之则会贻害无穷。朋友在于精，不在于多，狐朋狗友千千万，不如知己一人。