Commentators explain that Paul uses two different Greek words for 'burden.' In verse 2, he speaks of heavy, crushing 'burdens' (barē) that we should help others with. Here in verse 5, the word (phortion) means a personal 'load' or 'pack,' like a soldier's individual equipment. This verse isn't contradicting the call to help others; it's clarifying that we each have personal responsibilities and duties that we alone must carry.