This poem is relatively short, and is in an older style where the poem indicates a kind of tale or advisory message.

Here is one literally on virtue by George Herbert:

Virtue
George Herbert

Sweet day, so cool, so calm, so bright,
The bridal of the earth and sky;
The dew shall weep thy fall to-night,
For thou must die.

Sweet rose, whose hue angry and brave
Bids the rash gazer wipe his eye;
Thy root is ever in its grave,
And thou must die.

Sweet spring, full of sweet days and roses,
A box where sweets compacted lie;
My music shows ye have your closes,
And all must die.

Only a sweet and virtuous soul,
Like season'd timber, never gives;
But though the whole world turn to coal,
Then chiefly lives.