Sin is disobedience towards God

Vain talk - Pro 10:19 In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.

Contempt for others - Pro 14:21 He that despiseth his neighbour sinneth: but he that hath mercy on the poor, happy is he.

Foolish thoughts - Pro 24:9 The thought of foolishness is sin: and the scorner is an abomination to men.

Unbelief - Rom 14:23 And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.

Neglect of opportunity - James 4:17 Therefore to him that knoweth to do good, and doeth it not, to him it is sin.

Transgression of the Law - 1 John 3:4 Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.

All unrighteousness - 1 John 5:17 (regardless if we think it is sin) All unrighteousness is sin: and there is a sin not unto death.

(1 Tim 2:14) And Adam was not deceived, but the woman being deceived was in the transgression.

(2 Tim 3:13) But evil men and seducers shall wax worse and worse, deceiving, and being deceived.

(Titus 3:3) For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another.

Sin is disappointing - Is. 17:11 In the day shalt thou make thy plant to grow, and in the morning shalt thou make thy seed to flourish: but the harvest shall be a heap in the day of grief and of desperate sorrow.

7 Then said he unto the dresser of his vineyard, Behold, these three years I come seeking fruit on this fig tree, and find none: cut it down; why cumbereth it the ground?

8 And he answering said unto him, Lord, let it alone this year also, till I shall dig about it, and dung it:

9 And if it bear fruit, well: and if not, then after that thou shalt cut it down.

Pro 8:36; But he that sinneth against me wrongeth his own soul: all they that hate me love death.

Sin demands more attention (increases the desire for more sin - becomes a way of life) - Ps. 52:3(Thou lovest evil more than good; and lying rather than to speak righteousness. Selah.

For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.