Human development seems to be a catch-all phrase these days. All experiences affect our development either positively or negatively, as with every choice we make. It is a natural cause and affect that whenever we choose to do something, we are choosing not to do something else. 

Neal A. Maxwell raised the level of that thought by saying, "commitment to truth requires the rejection of some things as well as the acceptance of others."

Choices that we make, or don't make, boil down to our conduct and our conduct determines our way of life. That is put rather simply when there are so many cultural, physical, geographical, etc., influences on our conduct. But to reach for the highest influences upon ourselves the, "sincere seeker after celestial culture must be more concerned with the preparation for that culture than with the preservation of present culture." (Maxwell.)

We live in a time when, more often than not, bad is seen as good and good as seen as bad. If we have tried to uphold values and stand on principle we have felt the ire of those situations to some extent. It is a time foretold in the scriptures. "We, likewise, will be confronted with major ironies in which people will turn to teachers of the world and be turned away “from the truth” and “turned into fables.” (See 2 Tim. 4:4.)" (Maxwell)

We must remain true to the standards and values that Jesus Christ instills in all those who commit themselves to truth. As we choose to keep developing the highest attributes, we are also choosing to positively influence our development. 

The way will become increasingly more difficult as time marches on. As our 'human development' rises to the level of the truth we bring to it, we will come to realize the following truth. Beyond all the confusion and noise of the world there are many who stand together, stalwart and true, in seeking after celestial things. Good Blessings.