Antonyms for the phrase "be a source of strength" include being a source of weakness, a hindrance, or an obstacle. If someone or something is not providing strength, they may instead be causing strain or stress, leaving individuals feeling unsupported or drained. Being a negative influence or damaging force can have a significant impact on one's emotional and physical wellbeing, leading to a lack of motivation and a decrease in overall mental health. It is important to identify when something or someone is not giving us strength so that we can take steps to remove them from our lives or find ways to counteract their negative effects.