For sleep, one needs endless depths of blackness to sink into; daylight is too shallow, it will not cover one.
Deep-versed in books and shallow in himself.
Mystical explanations are thought to be deep; the truth is that they are not even shallow.
Deep down, I happen to be very shallow.
Through shallow intellect, the mind becomes shallow, and one eats the fly, along with the sweets.
It is a ship with a great deal of sail but a very shallow keel.
Profitability is a shallow goal if it doesn't have a real purpose, and the purpose has to be share the profits with others.
Seriousness is the only refuge of the shallow.
I'm a very simple person. I'm very shallow. Shallow, simple, easily pleased: that's me.
It sounds deeply shallow, but for brief spells every member of the public can be fascinating.