Assurance makes most for your comfort, but holiness makes most for God's honor...Assurance is the daughter of holiness...The surest and shortest way … - Thomas Brooks

I could heartily wish that you and all others concerned in this sad loss, were more taken up in minding the happy exchange that she hath made, than with your present loss. She hath exchanged earth for heaven, a wilderness for a paradise, a prison for a palace, a house made with hands for one eternal in the heavens (2 Cor 5:1-2). She hath exchanged imperfection for perfection, sighing for singing, mourning for rejoicing, prayers for praises, the society of sinful mortals for the company of God, Christ, angels, and the spirits of just men made perfect, Heb 12:22-24; an imperfect transient enjoyment of God for a more clear, full, perfect, and permanent enjoyment of God. She hath exchanged pain for ease, sickness for health, a bed of weakness for a bed of spices, a complete blessedness. She hath exchanged her brass for silver, her counters for gold, and her earthly contentments for heavenly enjoyments.

Such as diligently search the Scripture shall find that true blessedness, happiness, and salvation is attributed to several signs: sometimes to the fear of God, sometimes to faith, sometimes to repentance, sometimes to love, sometimes to meekness, sometimes to humility, sometimes to patience, sometimes to poverty of spirit, sometimes to holy mourning, sometimes to hungering and thirsting after righteousness; so that if a godly man can find any one of those in himself, he may safely and groundedly conclude of his salvation and justification, though he cannot see all those signs in him.

The more any man is in the contemplation of truth, the more fairer and firmer impression is made upon his heart by truth.