Charles H. Spurgeon on Psalms 145:2

Every day will I bless thee. Whatever the character of the day, or of my circumstances and conditions during that day, I will continue to glorify God. Were we well to consider the matter we should see abundant cause in each day for rendering special blessing unto the Lord. All before the day, all in the day, all following the day should constrain us to magnify our God every day, all the year round. Our love to God is not a matter of holy days: every day is alike holy to holy men. David here comes closer to God than when he said, "I will bless thy name": it is now, "I will bless thee." This is the centre and kernel of true devotion: we do not only admire the Lord's words and works, but himself. Without realizing the personality of God, praise is well nigh impossible; you cannot extol an abstraction. And I will praise thy name for ever and ever. He said he would bless that name, and now he vows to praise it; he will extol the Lord in every sense and way. Eternal worship shall not be without its variations; it will never become monotonous. Heavenly music is not harping upon one string, but all strings shall be tuned to one praise. Observe the personal pronouns here: four times he says "I will": praise is not to be discharged by proxy: there must be your very self in it, or there is nothing in it.