If you have ever made the smallest self sacrifice to alleviate another person's problem because you love them, you have.
You don't always have to give a testimony, be, that is, "keep" the testimony.
Blathering a "testimony" in front of others is not only useless, it is damaging...
Mat 6:1 Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven.
Mat 6:2 Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward.
Mat 6:3 But when thou doest alms, let not thy left hand know what thy right hand doeth:
Mat 6:4 That thine alms may be in secret: and thy Father which seeth in secret himself shall reward thee openly.
Mat 6:5 And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
Mat 6:6 But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
Mat 6:7 But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.
Mat 6:8 Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.
What should we do?
Mat 5:14 Ye are the light of the world. A city that is set on an hill cannot be hid.
Mat 5:15 Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house.
Mat 5:16 Let your light so shine before men, that they may
see your good works, and
glorify your Father which is in heaven.
No mention of hearing here, is there?