maitri (मैत्री, maitrī) = love; congeniality; friendliness
adishu (आदिषु, ādiṣu) = and so on
balani (बलानि, balāni) = power; strength

Meditation enables you to determine the nature of your feelings, thoughts and actions. Selecting a trait, characteristic or emotion for samyama will result in its developing within you. However, Patanjali advises us to strengthen only positive emotions and traits through meditation, as they help us on our spiritual path. If your samyama focuses on hatred, this feeling will grow within you and will distract you from your inner path – and thus you will never attain the state of yoga. You can only progress on the path of yoga on the basis of positive characteristics. This will enable you to feel the love, empathy and gratitude that a genuinely advanced yogi emanates.