深居简出

shēnjū-jiǎnchū

[live in the seclusion of one's own home and seldom come out; live a secluded life with few social contacts] 平时总是呆在家里, 很少外出。 谓避世而独处

自摈弃以来, 尤自刻励, 深居简出, 几不与世人相通。 --宋·秦观《谢王学士书》