No one can become a devotee of the Formless Supreme (Nirguna bhaktha) without having been a devotee of the form (Saguna bhakta).

Explaining the characteristics of a devotee, Rama said to Narada, “Whoever with discrimination and renunciation (viveka and vairagya), and humility and wisdom (vinaya and vijnana) is aware of the knowledge of Reality, whoever is always immersed in the contemplation of My play (leela), whoever dwells on My name at all times and under all conditions, and whoever sheds tears of love whenever the Lord’s name is heard from any lip — these are My genuine devotees.” When the infant grows up into an adult, the mother won’t pay so much attention to its safety. The Lord doesn’t pay much attention to the wise one (jnani). For the jnani, their own strength is enough. Therefore, until one can rely on one’s own strength, one must be an infant in the Lord’s hands, as a devotee of the form, right? No one can become a devotee of the Formless Supreme (Nirguna bhaktha) without having been a devotee of the form (Saguna bhakta). 

Bagavan Sri Sri Sri Sathya Sai Baba