H . O. Meredith . When the deep vault of heaven opened far Reaches of space from star to star , And I had flung my sight Beyond all barrier of the azure haze , The garment of the days , Which the sun weaves of shattered light and air The sun deceives , Darkness alone all secrets doth declare . Not when the heart is glad and swells with loud Paean of youth , Or triumph of maturer years , Can it draw near to knowledge . Tears And sorrow , sorrow , are the soul of truth . Not because all is sadness Inevitably : the joys that do obscure Are no less real Than sorrows which reveal ; But joy the spendthrift reckons not in pence The things that make his gladness , But grief a strict accountant will commence To tell base coin from the pure . Has any man a friend Crowned with delight and full prosperity , Who walk together seeming whole And interweave caressing arms ? Let these not boast communion of soul Till fate her message send Ultimate doom , or terrible alarms , And set them naked each in the other 's eye , 120