Yoga Sutra 1.39 meditation on what appeals to him

Sūtra I.39

Or by meditation on what appeals to him

Let him meditate on whatever appeals with the aim of steadying the mind, for steadying the mind is the purpose here. It must not be to secure pleasures and so on, for there is the prohibition ‘Even if one should obtain objects, let him never dwell on them in any way’. Having found something which is a proper object for meditation on which he can steady his mind, he will be able to steady it on other things also, the things specifically prescribed for the training.