4. But where the souls, those deathless things, That left this dying clay ? My thoughts, now stretch out all your wings, And trace eternity. 5. O that unfathomable sea! Those deeps without a shore! Where living waters gently play, Or fiery billows roar. 6. Thus must we leave the banks of life, And try this doubtful sea: Vain are our groans and dying strife To gain a moment's stay.