Everyday life

It is important only to move in a predatory manner whilst immediately engaged in taijiquan practice.
Out of class your body must remain free, nimble, spontaneous and agile.

Expressing your body in a permanently pugilistic way is pointless and unhealthy. There are few occasions in daily life that require combat.

In terms of strategy, it is unwise to advertise that you are a martial artist. Far wiser to appear unassuming and innocuous.
This gives you the element of surprise.