In plain words
What does skill mean? It has a name: yoga. It is not something that deceives others. It is the very thing that demonstrates by example. That is why it turned into yoga. ‘Yogaś cittavṛtti nirodhaḥ’: in order to still the movements of the citta that were in them, it turned into a yoga. In this way he set his mothers' minds at rest, upheld the honour of the family, and went to the forest.
In the time of the forest too, he saw deeds of rākṣasas of many kinds: “My father has made me ruler of the forest for this governance. These rākṣasas are standing in the way of the right sādhana of the ascetics. So one must kill these rākṣasas, so that the sādhanas of these ascetics do not falter.” But at the time of destroying these rākṣasas, a difficulty stands in the way. May one destroy rākṣasas who are women too? Long before, when he went there to guard Viśvāmitra's yajña and was about to destroy this Tāṭakī, he pondered. “Gurujī! May one kill this Tāṭakī, a woman?” “One may,” he said; “one may kill even women who are rākṣasas, who break the joy of sādhanas, of tapas and of the ṛṣis,” he said. As if he knew nothing, Rāma asks. “Gurujī! Is there anyone among the kings who has slain in this way?” he said. “Simpleton! To Virocana, the grandson of Prahlāda, a child was born. She was a woman. Her name was Mantharā. That Mantharā tormented ṛṣis of many kinds, killed all the other ṛṣis for her own desire, and kept falling into many sins. At that time the king himself had her killed. But there was no fault in that.” Whoever it may be, when they stand in the way of divinity, whatever anyone does to them is no wrong.
One may give up whatever stands in the way of the path to God
It was so in Mīrā's time too: a dharma of this kind stood in the way.