The saints speak of something they call the inextinguishable light. It is a light not of the eye but of the heart that never ceases to walk in purity and clearness. It swiftly leaves the darkness behind, and constantly strives towards the day's height. Its constant quality is to be continually purified. This is the light of eternity that can never go out, and that shines through the veil of time and matter. The saints never say that this light is given to them, but that it is given only to those who have purified their hearts in love for the Lord, on the narrow way which they have freely chosen.
The chasm between being alone and loneliness is deep. The way you begin to be alone and at peace without being lonely is to know that you are with your best friend. When you are at peace with yourself and love yourself, you can never be lonely. Only when you learn to love yourself, can you love another. You must find that love for yourself before you can touch the purity of aloneness. Love of self, without being selfish, will not allow loneliness to exist. Love of self also creates a love for everything else and brings us closer to the Sacred Oneness.