The History of the Rise, Progress and Accomplishment of the Abolition of the African Slave Trade by the British Parliament (1808), Vol. 1 (Clear Print)

I scarcely know of any subject, the contemplation of which is more pleasing, than that of the correction or of the removal of any of the acknowledged evils of life; for while we rejoice to think that the sufferings of our fellow-creatures have been thus, in any instance, relieved, we must rejoice equally to think, that our own moral condition must have been necessarily improved by the change.