Peter is not healing the man in order to win an opportunity for preaching. He could not know beforehand that this healing would create an opportunity for preaching. He heals the man from a place of compassion.1 The Spirit has created a compassion in his heart (much like the compassion which Jesus had for people; see Matthew 9:35–38).
6 Alors Pierre lui dit: Je n'ai ni argent, ni or; mais ce que j'ai, je te le donne: au nom de Jésus-Christ de Nazareth, lève-toi et marche.