Wiktionary
feel oneself
vb. (context idiomatic English) To feel comfortable or normal; to be in one's usual mood or state of health.
Usage examples of "feel oneself".
They are living out, in a comic mimesis, the fate of Arthur and Guenevere, but to be ruled by a comic fate is not to feel oneself as a figure of comedy.
It is a terrible thing to feel oneself useless and at the same time on every side to see halfwits and profascists filling important jobs.
And given the generous effort of the imagination to feel oneself Welsh instead of English, who could blame him?
To either side stretched reeling chasms of air so vast that merely to look into their depths was to feel oneself falling.