one's principles and position; one's beliefs and stance
A yojijukugo referring to a person's firmly held principles and the stance they take based on them. Often used in political, ideological, or personal conviction contexts.
He never compromises his principles and position.
In an election, you should listen carefully to each candidate's beliefs and stance.
主義 alone means 'principle' or 'doctrine', but 主義主張 is a set phrase that bundles principles with the resulting position or assertion.
A yojijukugo combining 主義 (principle, doctrine) and 主張 (assertion, claim). The exact historical derivation is uncertain, but it is a natural compound expressing the concept of one's principles and the stance taken based on them.