Regarding the saying of Allah, “so let them respond to Me, and let them have faith in Me” Imam al-Sadiq (AS) said, ‘It means that: “they should know that I [Allah] am capable of giving them what they ask Me for”.
الإمامُ الصّادقُ (عَلَيهِ الّسَلامُ) ـ في قَولِهِ: «فَلْيَستَجِيبُوا لِي وَلْيُؤْمِنُوا بِي» ـ: يَعلَمُونَ أنِّي أقدِرُ عَلَى أنْ اُعطِيَهُم ما يَسألُونِّي .