Charles H. Spurgeon on Psalms 61:2

The end of the earth. What place was this, the end of the earth, referring the expression to the writer of the Psalm? We know that the centre of the affections and devotions of the pious Israelite was the "holy city, Jerusalem; whither the tribes went up, even the tribes of the Lord, to testify unto Israel, and to give thanks unto the name of the Lord." The country of which this city was the capital, was to the Jew the world; it was the world within the world; the earth within the earth; the whole globe besides was to him a waste, a place out of the world; an extraterrestrial territory, beyond the limits set up by the Lord Almighty. Thus in Holy Writ what is called the world, or the earth, frequently signifieth only that part thereof which was the heritage of the chosen people... The end of the earth, then, as referred to the psalmist, would signify any place of bodily absence from the temple where the Deity had taken up his special abode, or any place whence his spiritual affections were unable to reach that temple. As referred to us, the expression signifies any sensible distance from God: for as God is the centre of life, hope, love, and joy, distance from him, of whatsoever degree, is the antipodes of the soul, a region of sterility and darkness; the Iceland of man's spirit. Alfred Bowen Evans, 1852.