When you are able to relax and take your time, meaning look inside where there is no time and space you will find infinity.
He clearly states it, 'Here's is my key , philosophy a freak like me needs infinity'
He says that the his own way of living is not normal , because he is a freak as he said, and that he found his own key of existence.
The last 6 months i am very deep into meditation and spiritual awakening and i am pretty sure that those simple lyrics are not just beat. I can almost feel what the artist felt when wrote them. What we experience it is just a 3-D reality, it is a perspective of a massive picture. The way to see the whole picture is via inner exploration.
The only way to experience infinity is by self love and connecting to the divine, the Unity.
The sad/strange thing here is that Guru Josh suicide. Probably he believed that dying will reach something greater, but my opinion is that there is greatness in every reality and that according to what angle we see the picture every time we must fully experience it.