I am all in a sea of wonders; I doubt; I fear; I think strange things which I dare not tell to my own soul. And yet I must not be weak; there is work for me to do, and others to help, and I will be of use.
Mina admits the churn before choosing usefulness. The sea image makes confusion tidal yet survivable. Short clauses show breath catching; resolve answers with ‘I will be of use.’