“Problems or successes, they all are the results of our own actions. Karma. The philosophy of action is that no one else is the giver of peace or happiness. One's own karma, one's own actions are responsible to come to bring either happiness or success or whatever... As you sow, so shall you reap. It's a very old proverb of mankind. As you sow, so shall you reap. Sometime you may have killed that man, and then sometime now he comes to kill you... What we have done, the result of that comes to us whenever it comes, either today, tomorrow, hundred years later, hundred lives later, whatever, whatever. And so, it's our own karma.
That is why that philosophy in every religion: Killing is sin. Killing is sin in every religion. Whosoever sins, whoever is killed, it doesn't matter. It's a sin. And sin.. is a punishable offense. Because when you sin, when you've killed some man, what you are killing? You are killing the cosmic potential within the individual. Individual is cosmic. Individual potential of life is cosmic potential. Individual is divine deep inside. Transcendental experience awakens that divinity in man...When you kill a man like that you deprive him from getting to his human right.”

Opening address to the National Day of Prayer in Suva, 15 May 2005 (excerpts) http://www.fiji.gov.fj/publish/page_4607.shtml

Source: The 7 Habits of Highly Effective People

Source: The Power of Your Subconscious Mind -

Saying published anonymously in The Dayspring, Vol. 10 (1881) by the Unitarian Sunday-School Society, and quoted in Life and Labor (1887) by Smiles; this is most often attributed to George Dana Boardman, at least as early as 1884, but also sometimes attributed to William Makepeace Thackeray as early as 1891, probably because in in Life and Labor Smiles adds a quote by Thackeray right after this one, to Charles Reade in 1903, and to William James as early as 1906, because it appears in his Principles of Psychology (1890).
Misattributed
Source: Happy Homes and the Hearts That Make Them

The State of the World 2010, public lecture in New York City, USA, (July 2010)

Reported in Phinneys' Calendar (1878), edited by Andrew Beers.

Possibly a misattribution, ascribed to Reade in Notes and Queries (9th Series) vol. 12, 17 October 1903. It appears (as an un-sourced quotation) in Life and Labor (1887) by Samuel Smiles and in the front of The Power of Womanhood by Ellice Hopkins (1899) htm http://www.gutenberg.org/files/13722/13722-h/13722-h..
Apparently a common saying in 19th century. It has been also attributed to an “old Chinese proverb”, Ralph Waldo Emerson (1803-1882), William Makepeace Thackeray (1811–1863), George Dana Boardman (1828-1903), Frances Elizabeth Caroline Willard (1839-1898), James Allen (1864-1912), Marcus Fabius Quintilianus http://en.wikipedia.org/wiki/Quintilian http://www.worldofquotes.com/author/Quintilian-(Marcus-Fabius-Quintilian)/1/index.html and William James.
No original source has ever been isolated. Its structure strongly reflects that of a ""classical Chinese"" set of aphorisms; and it may have been deliberately constructed in that form, by a non-Chinese, to imply an oriental (and, perhaps, far wiser) origin.
Finally, almost all of those who cite the complete piece:
::We sow a thought and reap an act;
::We sow an act and reap a habit;
::We sow a habit and reap a character;
::We sow a character and reap a destiny.
state that, in their view, it was written to expand an embellish the notion that was expressed at Proverbs XXIII:7 (""For as he thinketh in his heart, so is he"").
Attributed

After been forcibly carried out from the Assembly building by police(1986)http://news.bbc.co.uk/onthisday/hi/dates/stories/june/24/newsid_2519000/2519077.stm