The OED gives very extensive treatment to the verb 'bless'. I think that its meaning 7 is perhaps relevant to this question. Note that whilst it was 'originally said of God; in later use also of men and things'. In addition to the below the OED also mentions the popular saying about 'having a penny to bless oneself with', referring to a cross on an old silver penny. But I think meaning 7 is interesting. I have significantly edited the vast list of examples:
a. To confer well-being upon; ‘to make happy; to prosper, make successful’ (Johnson). Originally said of God; in later use also of men and things, but generally with an implication of their conferring instrumentally a divine blessing. (Here the association of bless with bliss becomes apparent.)
1549 Bk. Common Prayer (STC 16267) Matrimonie f. xvi*, Looke, O Lord, mercifully vpon them from heauen, and blesse them.
1600 Shakespeare Merchant of Venice iv. i. 183 It [sc. mercy] is twice blest, it blesseth him that giues, and him that takes.
1600 Shakespeare Henry IV, Pt. 2 i. ii. 223 God blesse your expedition.
1697 Dryden tr. Virgil Georgics iv, in tr. Virgil Wks. 144 But she return'd no more, to bless his longing Eyes.
1715 Pope tr. Homer Iliad I. i. 144 When first her blooming Beauties blest my Arms.
1813 Byron Giaour 36, I have possesst, And come what may, I have been blest.
1847 Thackeray Vanity Fair (1848) xxxi. 274 ‘God bless the meat,’ said the Major's wife, solemnly.
1850 T. T. Lynch Memorials Theophilus Trinal v. 88 To say that good gives pleasure seems poor expression of the truth that it blesses us.
b. To make happy with some gift: orig. of God as the giver; also of persons or things. (In the first example, blitsian may be really = bliðsian (in bliss n.).)
1600 B. Jonson Every Man out of his Humor ii. iii. 70 She was blest with no more Copie of wit.
1606 Returne from Pernassus ii. v. sig. D2, I will blesse your eares with a very pretty story.
a1616 Shakespeare Tempest (1623) ii. i. 130 You may thank your selfe..That would not blesse our Europe with your daughter.
1649 R. Baxter Saints Everlasting Rest (new ed.) iii. i. 266, I should..return him hearty thanks upon my knees, that ever he blessed his Word in my mouth with such desired success.
1712 J. Arbuthnot John Bull in his Senses iv. 15 Mrs. Bull..bless'd John with three daughters.
1767 J. Fordyce Serm. Young Women I. i. 14 Are you..blest with parents?
1845 P. J. Bailey Festus (ed. 2) 6 To bless him with salvation.
Therefore, in summary it does appear that a human being and an inanimate thing can 'bless' as subject of the verb, though usually with a suggestion, sometimes express sometimes implied, of the blessing being of divine origin