Know because

1. 1 Sam. 3: 13
     13 For I have told him that I will judge his house for ever for the iniquity which he knoweth; because his sons made themselves vile, and he restrained them not.
2. Job 8: 9
     9 (For we are but of yesterday, and know nothing, because our days upon earth are a shadow:)
3. Hosea 4: 6
     6 ¶ My people are destroyed for lack of knowledge: because thou hast rejected knowledge, I will also reject thee, that thou shalt be no priest to me: seeing thou hast forgotten the law of thy God, I will also forget thy children.
4. 1 Cor. 2: 14
     14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
5. Mosiah 27: 27
     27 I say unto you, unless this be the case, they must be cast off; and this I know, because I was like to be cast off.
6. Alma 8: 12
     12 And now we know that because we are not of thy church we know that thou hast no power over us; and thou hast delivered up the judgment-seat unto Nephihah; therefore thou art not the chief judge over us.
7. Alma 34: 36
     36 And this I know, because the Lord hath said he dwelleth not in unholy temples, but in the hearts of the righteous doth he dwell; yea, and he has also said that the righteous shall sit down in his kingdom, to go no more out; but their garments should be made white through the blood of the Lamb.