20 To myself also, the very least and last, how often has it been revealed, how frequently and manifestly has it been commanded by the condescension of God, that I should diligently bear witness and publicly declare that our brethren who are freed from this world by the Lord's summons are not to be lamented, since we know that they are not lost, but sent before; that, departing from us, they precede us as travellers, as navigators are accustomed to do; that they should be desired, but not bewailed; that the black garments should not be taken upon us here, when they have already taken upon them white raiment there; that occasion should not be given to the Gentiles for them deservedly and rightly to reprehend us, that we mourn for those, who, we say, are alive with God, as if they were extinct and lost; and that we do not approve wills the testimony of the heart and breast the faith which we express with speech and word. We are prevaricators of our hope and faith: what we say appears to be simulated, feigned, counterfeit. There is no advantage in setting forth virtue by our words, and destroying the truth by our deeds.
Source: The Treatises of Cyprian (New Advent)