What is the time when you have felt part of the infinite? Infinite is always around us, we are always merged in if only we aren't able to experience it since we ourselves are busy making ourselves into a separate entity.
In this universe nothing acts as separate, everything is part of everything else, existence is merging with us and we emerge from it, through it. There is a lovely Mantra written by Adi Shankaracharya around 1400 years back which is called Nirvaan Shatkam.
Here Adi shankarachraya says -
मनो बुद्धि अहंकार चित्तानी नाहं
नच श्रोत्र जिव्हे नच घ्राण नेत्रे
नच व्योम भूमि न तेजो न वायु
चिदानन्द रूप: शिवोहम शिवोहम
I am neither mind, nor intellect, nor ego, nor mind I am neither ear, nor tongue, nor nostril, nor eye I am neither sky, nor earth, nor fire, nor air I am pure consciousness, eternal, infinite Shiva.