"'They are like a well-watered plant in the sunshine, spreading its shoots over the garden; it entwines its roots around a pile of rocks and looks for a place among the stones. But when it is torn from its spot, that place disowns it and says, "I never saw you." Surely its life withers away, and from the soil other plants grow.'" NIV translation
Bildad continues to use the wisdom of their ancestors (which was developed by the fact that they were farmers) to try to explain Job's current situation. He compares Job to a plant that had everything that it needed to be fruitful but went searching for something else. In so doing, Bildad is basically saying that Job's situation is due to the fact that he has strayed from the religious teaching of his ancestors.
"'Surely God does not reject one who is blameless or strengthen the hands of evildoers.'" NIV translation
Bildad is blunt and basically comes out to tell Job that, like the withering plant, his current situation can only be due to the fact that he is a miserable sinner that is not right with God.
"'He will yet fill your mouth with laughter and your lips with shouts of joy. Your enemies will be clothed in shame, and the tents of the wicked will be no more.'" NIV translation
Based on their traditions, Bildad is confident that God will make Job happy again and that his enemies will be defeated. He is confident that it will happen but he completely misses the reason behind it. Once again, we are reminded of the fact that traditions and the experience of our ancestors is good until it limits our ability to see God at work in ways that they never saw. It is kind of like driving a car forward but only looking in the rear view mirror.
The traditions and experience of those who have gone before us can provide a solid base of understanding of our faith just as the Apostles did as is recorded in Acts. But, if you stopped learning at that point and did not read Revelation, you would not really be as strong and mature in your faith. This would also limit your ability to see what is happening today.