The report that gets quoted at anxious people
This is the most misused text in Muslim material on anxiety. It gets read as though strong means calm, so an anxious person concludes they must be the weak one. Read the whole thing. It affirms good in both. What quwwa refers to is a question for a scholar to settle and not for a platform, and we are not settling it here.
Qur’an and Sunnah
Abu Huraira reported Allah's Messenger (ﷺ) as saying:A strong believer is better and is more lovable to Allah than a weak believer, and there is good in everyone, (but) cherish that which gives you benefit (in the Hereafter) and seek help from Allah and do not lose heart, and if anything (in the form of trouble) comes to you, don't say: If I had not done that, it would not have happened so and so, but say: Allah did that what He had ordained to do and your" if" opens the (gate) for the Satan
Sahih Muslim 2664graded sound, sahihaynfull report