How does the following poem express the beliefs of the humanist movement?

Sonnet 4 from Astrophil and Stella
by Sir Philip Sidney

Virtue, alas, now let me take some rest.
Thou set’st a bate between my will and wit.
If vain love have my simple soul oppress’d,
Leave what thou likest not, deal not thou with it.
Thy scepter use in some old Cato’s breast;
Churches or schools are for thy seat more fit.
I do confess, pardon a fault confess’d,
My mouth too tender is for thy hard bit.
But if that needs thou wilt usurping be,
The little reason that is left in me,
And still th’effect of thy persuasions prove:
I swear, my heart such one shall show to thee
That shrines in flesh so true a deity,
That Virtue, thou thyself shalt be in love.